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Mind Map by kirstygb14, updated more than 1 year ago
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Created by Muna Khatun
almost 9 years ago
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Copied by kirstygb14
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C6: Electrolysis
- Ions
- In an ionic solid are
fixed/can't move
- Ionic substance that
is molten or in a
solution are free to
move
- In an ionic solid are
fixed/can't move
- What is it?
- Is a chemical reation in which ionic liquid
is decomposed into its elements using an
electric current
- Is a flow of charge produced by
moving ions and ions are discharged
at the electrodes
- Is a chemical reation in which ionic liquid
is decomposed into its elements using an
electric current
- Ionic substance
- Is called ELECTROLYTE
- Must be molten as the ions
need to be free to move
- Positive ions (CATIONS) move
to and discharge at negative
electrode (CATHODE)
- Negative ions (ANIONS) move to
and discharge at positive electrode
(ANODE)
- Positive ions (CATIONS) move
to and discharge at negative
electrode (CATHODE)
- Is called ELECTROLYTE
- Electrons
- Removed from
negative ions
- Electrons then flow around the circuit to the
negative electrode and are passed to the positive
ions
- Removed from
negative ions
- Amount of substance produced:
- Determined by the size
of the current and the
length of time it flows
for
- Most substance is made if a larger
current flows and flows for a longer
time
- Quantity of electricity (Q) passed in an
electrolysis reaction can be calculated using
this formula:
- Quantity of electricity (Coulombs) (Q) =
Current (Amps) (I) x Time (Seconds) (T)
- Quantity of electricity (Coulombs) (Q) =
Current (Amps) (I) x Time (Seconds) (T)
- Determined by the size
of the current and the
length of time it flows
for
- Electrolysis in Copper (II) Sulfate
- When electric current passed through CuSO4
solution using copper electrodes:
- 1) The positive electrode bubbles as
oxygen is made and the mass decreases
because ions move FROM it
- 2) The negative electrode becomes
plated w/ copper and the mass
increases because ions move TO it
- 3) The electrolyte will become less
blue as CuSO4 decomposes
- 1) The positive electrode bubbles as
oxygen is made and the mass decreases
because ions move FROM it
- When electric current passed through CuSO4
solution using copper electrodes:
- Aqueous Solutions
- When undergoes electrolysis, it's often easier to
decompose the water to decompose the
compound it's dissolved in
- When undergoes electrolysis, it's often easier to
decompose the water to decompose the
compound it's dissolved in
- Tests
- For hydrogen gas: lighted
splint causes a 'POP'
- For oxygen gas: a
glowing splint is re-lit
- For hydrogen gas: lighted
splint causes a 'POP'
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